body {
  margin: 0;
  padding: 0;
}
.box {
  width: 100%;
  height: 100%;
  padding: 60px 40px;
  box-sizing: border-box;
  overflow: hidden;
}
.export-img-box {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  padding: 46px;
  box-sizing: border-box;
  z-index: 3;
  display: flex;
  justify-content: center;
  align-items: center;
}
.export-img-box img {
  max-width: 80%;
  max-height: 80%;
}
